Autolite 458 Spark Plug

Reliable Ignition with Autolite Copper Spark Plug 458

The Autolite Copper Spark Plug 458 delivers consistent ignition performance for a variety of vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine operation.

• Standard center electrode with copper core for optimal conductivity
• Tapered ground electrode tip made of nickel for durability
• Flat seat type ensuring proper sealing and fit
• Short ceramic insulator for reliable insulation and heat resistance
• Pre-gap size of 0.030 inches (0.80 mm) for precise spark gap
• Hex size of 13/16" (21 mm) for easy installation
• Thread diameter of 14.0 mm and reach of 0.374 inches (9.5 mm)
• Stud type electrical terminal for secure connection

Detailed Features of the Autolite Copper Spark Plug 458

This spark plug features a copper core center electrode that enhances electrical conductivity, promoting efficient spark generation. The nickel ground electrode with a tapered tip design improves durability and consistent spark delivery. The flat seat type ensures a tight seal in the combustion chamber, preventing gas leaks. The short ceramic insulator provides excellent heat resistance and electrical insulation, supporting stable engine performance. With a pre-gap size of 0.030 inches (0.80 mm), the spark plug is ready for optimal ignition without additional adjustment. The 13/16" (21 mm) hex size and stud terminal type facilitate straightforward installation and secure electrical connection.

About the Autolite Copper Spark Plug Product Line

The Copper Spark Plug line by Autolite is engineered to provide reliable ignition performance using copper core electrodes, which offer superior conductivity compared to other materials. This product line focuses on delivering consistent spark and durability through nickel-tipped electrodes and quality ceramic insulators. The Copper Spark Plug 458 is part of this line, designed to meet the ignition needs of various automotive applications requiring a standard electrode design and precise fitment.

Common Applications and Issues Addressed

• Replacement for worn or fouled spark plugs in compatible vehicles
• Improves engine starting reliability and reduces misfires
• Helps restore fuel efficiency by ensuring proper combustion
• Addresses rough idling caused by inconsistent spark delivery
• Prevents spark plug electrode wear and corrosion

Installation Notes and Tips

Before installation, verify compatibility with your vehicle’s make and model to ensure proper fitment. Use a torque wrench to tighten the spark plug to manufacturer specifications, avoiding over-tightening which can damage the threads or seat. The 13/16" (21 mm) hex size allows for standard spark plug socket use. Check the pre-gap size of 0.030 inches (0.80 mm) before installation, adjusting if necessary to match vehicle requirements. Ensure the spark plug is seated flat against the cylinder head for optimal sealing.

Quality Assurance and Warranty

Autolite Copper Spark Plug 458 is manufactured to meet industry standards for ignition components. The use of copper and nickel materials along with ceramic insulation ensures durability and consistent performance. While specific warranty details are not provided, Autolite products typically adhere to quality control processes to support reliable operation in automotive ignition systems.